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HomeAircraftHelicopterHelicopter Main Discussion › FLUX... Am I missing something?
02-01-2013 07:19 PM  5 years agoPost 1
helijedi

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Noblesville IN

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I never ever ever use flux when I solder. I mean I've been soldering this stuff for years and years and have never purchased or used flux and have never had a solder joint go bad. I use silver bearing solder from radio shack..

http://www.radioshack.com/product/i...gcAAA&gclsrc=ds

Am I missing something should I start using it? and why?
(I doubt I will no matter what anyone says though lol)

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02-01-2013 07:23 PM  5 years agoPost 2
Dan Minick

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Columbus, WI

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i dont think that its 100 percent necessary. it just cleans the metal and helps solder stick in my experience. your probably fine either way

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02-01-2013 07:27 PM  5 years agoPost 3
darren heaver

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rochester, kent, england.

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It just gives a cleaner easier to make joint and it flows better you should never use a wet flux like bakers fluid or plumbing flux on cable joints as it will rot the cable and circuit boards. But to be honest do what is good for you

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02-01-2013 08:02 PM  5 years agoPost 4
Wedge77

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St. Charles Missouri USA

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Ive enver used it either, I always use a good silver solder, and it seems to be fine, however... I just recently really got into a lot of soldering, so i havent had any long term experience with how it last..

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02-01-2013 08:35 PM  5 years agoPost 5
eddiscus

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Dumont, NJ-USA

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Might want to use the rosin core version of that solder. Rosin flux for electronic work as well as acid flux for plumbing work have a very important function in the soldering process.

Copied from Wikipedia :

"In high-temperature metal joining processes (welding, brazing and soldering), the primary purpose of flux is to prevent oxidation of the base and filler materials. Tin-lead solder (e.g.) attaches very well to copper, but poorly to the various oxides of copper, which form quickly at soldering temperatures. Flux is a substance which is nearly inert at room temperature, but which becomes strongly reducing at elevated temperatures, preventing the formation of metal oxides. Additionally, flux allows solder to flow easily on the working piece rather than forming beads as it would otherwise.
The role of a flux in joining processes is typically dual: dissolving of the oxides on the metal surface, which facilitates wetting by molten metal, and acting as an oxygen barrier by coating the hot surface, preventing its oxidation. In some applications molten flux also serves as a heat transfer medium, facilitating heating of the joint by the soldering tool or molten solder.
Fluxes for soft soldering are typically of organic nature, though inorganic fluxes, usually based on halogenides and/or acids, are also used in non-electronics applications. Fluxes for brazing operate at significantly higher temperatures and are therefore mostly inorganic; the organic compounds tend to be of supplementary nature."

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02-01-2013 09:46 PM  5 years agoPost 6
ticedoff8

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Morgan Hill, CA. USA

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If you are using Radio Shack solder, then it is standard electrics solder and contains flex (rosin core). It is great for electrics, battery leads and light metel work.
But for silver solder or non-electronic work, you need an acid flux.

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02-01-2013 10:09 PM  5 years agoPost 7
JKos

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Redondo Beach, CA

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It says that solder has a rosin core. So, yes, you are using flux.

From the Radio Shack web site: "1 x Spool, 1.0oz., Diameter 0.015", Rosin Core Silver-Bearing (62%-tin, 36%-lead, 2%-silver) Solder"

- John

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02-01-2013 10:33 PM  5 years agoPost 8
YSRRider

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usa

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Rosin core solder that is thin works best as it melts the fastest. Tinning your wires first is a must and to do this efficiently, you need a quality iron that generates some heat. Especially when you are soldering parts like Deans connectors, you want to heat the terminal fast and get it soldered before the heat transfers and melts the plastic.

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02-01-2013 10:58 PM  5 years agoPost 9
helijedi

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Noblesville IN

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+1 YSR
Im good on all of that, always used a good 35watt and have a 80 for the ec5's and other big stuff. Worth repeating the 80watt is a life saver, it gets it done quick.

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02-02-2013 12:07 AM  5 years agoPost 10
qraptor

rrApprentice

Illinois

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I too have never had trouble with the rosin core solder.

And once I got the 80 W iron, those big connectors became so much easier. As helijedi said, it allows for quick soldering. And the less time heating the connector, the less likely is the plastic going to distort.

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